SAPPHIRE CATS EYE RARE GEMSTONE 1.57 Cts – SRI LANKA NATURAL LOOSE GEM 20912

100% Natural – Not treated in any way.
Rare Collectors Gem
Suitable for Museums,Institutions and Students of Gemology.
Will make a Gorgeous Ring or Pendent accented with Diamonds.
Beautiful sharp Catseye effect.
Large Sizes are Extremely Rare!
A Gem of Lasting Beauty.
Among the Rarest of gemstones.

Refractive Index: 1.759-1.778
Hardness: 9
Chemical Comp: AL2O3
Density: 4.00
Crystal Group: Hexagonal

Some Sapphires, display a single ray hence called Cats-eyes, Which are extremely rare – a collectors gem. Sapphire Cats-eyes belong to the Corundum family.

Sri Lanka is well known for the finest quality sapphires. They come in a range of colors and also colorless. Mining continues from ancient times to this day.